Finding the Fourth Proportional to 946,978.56, 1,306,443.51 and 699,214.28

Step by Step Solution

1. Step 1: Write the proportion equation
   946,978.56 : 1,306,443.51 = 699,214.28 : x
2. Step 2: Convert to fraction form
   946,978.56/1,306,443.51 = 699,214.28/x
3. Step 3: Cross multiply
   946,978.56x = 1,306,443.51 × 699,214.28
4. Step 4: Simplify right side
   946,978.56x = 913,483,951,673.11
5. Step 5: Solve for x
   x = 913,483,951,673.11/946,978.56
6. Step 6: Final answer
   x = 964,630.02